# singer = ["cali","zengfenghua","cali","yinxiang"]
# print(singer)
#
#
# cs_singer = {"cali","cali","zengfenghua","yinxiang","luhang","liqiang","dengjiangguo"}
# print(cs_singer)
# print(singer)
# singer =list(set(singer))
# print(singer)
# for cali in singer:
#     if
# name = {"zhangyu","wusheng","huyaowen","yazi","yazi","huangcan"}
# print(name)
# a = set("0,0,1,2,3,4,5,6")
# b = set("1,2,4,8,9,5,6,1")
# print(a)
# a = a - b
# print(a)
# c = a | b
# print(c)
# d = a & b
# print(d)

